I doubt anyone on this forum owns only one motorcycle, so this is for the ones that do the 1/4 mile still. My 450 Honda turned a 13.17 @ 99 mph in 1967 at high altitude. I'm going to install a high oil pressure pump mod to see if 95 psi will help, it might just slow it down too with all that oil flying around. The bike is a gen 1 zx14 with 14 lbs boost. launching a turbo is difficult as you have to leave almost at the rev limiter. There are old GS and KZ bikes killing me in the 1/8. It has 8" over, Shinko drag hookup, two stage lock up clutch. Just can't get those damn 3 tenths. More boost is likely to break the motor. No one knows everything, so input?

Have to shift at 9k which keeps us at the peak of torque and hp. Any higher and the trap speed drops off 5 mph. Rider suited is 230 lbs. We're going to try 8500k and see how that goes. The fuel drops off because we need a 6:1 fuel pressure regulator.

At this hp we have already broke a sprocket holder bearing so more hp is breaky breaky time. Good thing the bearing lunched on the dyno. My buddy on his turbo Busa ran a 7.90 at 182 mph and hurt his rod bearing.

Here's the final rub, Cycle world gets 9.50 at 149 mph on a bike right out of the crate!!

The bike has 50,500 miles on it, adding more power means less riding and more trouble.

Looks like it is still pulling strong at 10,600. It looks like you could easily shift at 10,000 and roll through the traps closer to the 10,600 mark. Have you tried this?

It pulls better at 9k, we've tried shifting up to 11k, shifting at around the torque peak works best. The hp at 10.5k looks better but it just doesn't work that way for some reason. At 8k it wants to pull you off the seat, then the thrust dwindles beyond that.